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Teach llvm-readobj to print ELF program headers

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llvm-svn: 179363
This commit is contained in:
Nico Rieck 2013-04-12 04:07:39 +00:00
parent a1dea0c714
commit e4564483fb
5 changed files with 136 additions and 5 deletions
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4
docs/CommandGuide/llvm-readobj.rst
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@ -76,6 +76,10 @@ input. Otherwise, it will read from the specified ``filenames``.
Display the needed libraries (only for ELF object files).
.. option:: -program-headers
Display the ELF program headers (only for ELF object files).
EXIT STATUS
-----------

74
test/tools/llvm-readobj/program-headers.test Normal file
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@ -0,0 +1,74 @@
RUN: llvm-readobj -program-headers %p/../../Object/Inputs/program-headers.elf-i386 \
RUN: | FileCheck %s -check-prefix ELF-I386
RUN: llvm-readobj -program-headers %p/../../Object/Inputs/program-headers.elf-x86-64 \
RUN: | FileCheck %s -check-prefix ELF-X86-64
ELF-I386: ProgramHeaders [
ELF-I386-NEXT: ProgramHeader {
ELF-I386-NEXT: Type: PT_LOAD (0x1)
ELF-I386-NEXT: Offset: 0x0
ELF-I386-NEXT: VirtualAddress: 0x8048000
ELF-I386-NEXT: PhysicalAddress: 0x8048000
ELF-I386-NEXT: FileSize: 308
ELF-I386-NEXT: MemSize: 308
ELF-I386-NEXT: Flags [ (0x5)
ELF-I386-NEXT: PF_R (0x4)
ELF-I386-NEXT: PF_X (0x1)
ELF-I386-NEXT: ]
ELF-I386-NEXT: Alignment: 4096
ELF-I386-NEXT: }
ELF-I386-NEXT: ProgramHeader {
ELF-I386-NEXT: Type: PT_GNU_STACK (0x6474E551)
ELF-I386-NEXT: Offset: 0x0
ELF-I386-NEXT: VirtualAddress: 0x0
ELF-I386-NEXT: PhysicalAddress: 0x0
ELF-I386-NEXT: FileSize: 0
ELF-I386-NEXT: MemSize: 0
ELF-I386-NEXT: Flags [ (0x6)
ELF-I386-NEXT: PF_R (0x4)
ELF-I386-NEXT: PF_W (0x2)
ELF-I386-NEXT: ]
ELF-I386-NEXT: Alignment: 4
ELF-I386-NEXT: }
ELF-I386-NEXT: ]
ELF-X86-64: ProgramHeaders [
ELF-X86-64-NEXT: ProgramHeader {
ELF-X86-64-NEXT: Type: PT_LOAD (0x1)
ELF-X86-64-NEXT: Offset: 0x0
ELF-X86-64-NEXT: VirtualAddress: 0x400000
ELF-X86-64-NEXT: PhysicalAddress: 0x400000
ELF-X86-64-NEXT: FileSize: 312
ELF-X86-64-NEXT: MemSize: 312
ELF-X86-64-NEXT: Flags [ (0x5)
ELF-X86-64-NEXT: PF_R (0x4)
ELF-X86-64-NEXT: PF_X (0x1)
ELF-X86-64-NEXT: ]
ELF-X86-64-NEXT: Alignment: 2097152
ELF-X86-64-NEXT: }
ELF-X86-64-NEXT: ProgramHeader {
ELF-X86-64-NEXT: Type: PT_GNU_EH_FRAME (0x6474E550)
ELF-X86-64-NEXT: Offset: 0xF4
ELF-X86-64-NEXT: VirtualAddress: 0x4000F4
ELF-X86-64-NEXT: PhysicalAddress: 0x4000F4
ELF-X86-64-NEXT: FileSize: 20
ELF-X86-64-NEXT: MemSize: 20
ELF-X86-64-NEXT: Flags [ (0x4)
ELF-X86-64-NEXT: PF_R (0x4)
ELF-X86-64-NEXT: ]
ELF-X86-64-NEXT: Alignment: 4
ELF-X86-64-NEXT: }
ELF-X86-64-NEXT: ProgramHeader {
ELF-X86-64-NEXT: Type: PT_GNU_STACK (0x6474E551)
ELF-X86-64-NEXT: Offset: 0x0
ELF-X86-64-NEXT: VirtualAddress: 0x0
ELF-X86-64-NEXT: PhysicalAddress: 0x0
ELF-X86-64-NEXT: FileSize: 0
ELF-X86-64-NEXT: MemSize: 0
ELF-X86-64-NEXT: Flags [ (0x6)
ELF-X86-64-NEXT: PF_R (0x4)
ELF-X86-64-NEXT: PF_W (0x2)
ELF-X86-64-NEXT: ]
ELF-X86-64-NEXT: Alignment: 8
ELF-X86-64-NEXT: }
ELF-X86-64-NEXT: ]

56
tools/llvm-readobj/ELFDumper.cpp
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@ -50,16 +50,18 @@ public:
virtual void printDynamicTable() LLVM_OVERRIDE;
virtual void printNeededLibraries() LLVM_OVERRIDE;
virtual void printProgramHeaders() LLVM_OVERRIDE;
private:
typedef typename ELFObjectFile<ELFT>::Elf_Shdr Elf_Shdr;
typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
typedef ELFObjectFile<ELFT> ELFO;
typedef typename ELFO::Elf_Shdr Elf_Shdr;
typedef typename ELFO::Elf_Sym Elf_Sym;
void printSymbol(symbol_iterator SymI, bool IsDynamic = false);
void printRelocation(section_iterator SecI, relocation_iterator RelI);
const ELFObjectFile<ELFT> *Obj;
const ELFO *Obj;
};
} // namespace
@ -399,11 +401,37 @@ static const EnumEntry<unsigned> ElfSectionFlags[] = {
LLVM_READOBJ_ENUM_ENT(ELF, SHF_MIPS_NOSTRIP )
};
static const EnumEntry<unsigned> ElfSegmentTypes[] = {
LLVM_READOBJ_ENUM_ENT(ELF, PT_NULL ),
LLVM_READOBJ_ENUM_ENT(ELF, PT_LOAD ),
LLVM_READOBJ_ENUM_ENT(ELF, PT_DYNAMIC),
LLVM_READOBJ_ENUM_ENT(ELF, PT_INTERP ),
LLVM_READOBJ_ENUM_ENT(ELF, PT_NOTE ),
LLVM_READOBJ_ENUM_ENT(ELF, PT_SHLIB ),
LLVM_READOBJ_ENUM_ENT(ELF, PT_PHDR ),
LLVM_READOBJ_ENUM_ENT(ELF, PT_TLS ),
LLVM_READOBJ_ENUM_ENT(ELF, PT_GNU_EH_FRAME),
LLVM_READOBJ_ENUM_ENT(ELF, PT_SUNW_EH_FRAME),
LLVM_READOBJ_ENUM_ENT(ELF, PT_SUNW_UNWIND),
LLVM_READOBJ_ENUM_ENT(ELF, PT_GNU_STACK),
LLVM_READOBJ_ENUM_ENT(ELF, PT_GNU_RELRO),
LLVM_READOBJ_ENUM_ENT(ELF, PT_ARM_EXIDX),
LLVM_READOBJ_ENUM_ENT(ELF, PT_ARM_UNWIND)
};
static const EnumEntry<unsigned> ElfSegmentFlags[] = {
LLVM_READOBJ_ENUM_ENT(ELF, PF_X),
LLVM_READOBJ_ENUM_ENT(ELF, PF_W),
LLVM_READOBJ_ENUM_ENT(ELF, PF_R)
};
template<class ELFT>
void ELFDumper<ELFT>::printFileHeaders() {
error_code EC;
typedef ELFObjectFile<ELFT> ELFO;
const typename ELFO::Elf_Ehdr *Header = Obj->getElfHeader();
@ -745,7 +773,6 @@ void ELFDumper<ELFT>::printUnwindInfo() {
template<class ELFT>
void ELFDumper<ELFT>::printDynamicTable() {
typedef ELFObjectFile<ELFT> ELFO;
typedef typename ELFO::Elf_Dyn_iterator EDI;
EDI Start = Obj->begin_dynamic_table(),
End = Obj->end_dynamic_table(true);
@ -808,3 +835,22 @@ void ELFDumper<ELFT>::printNeededLibraries() {
outs() << " " << Path << "\n";
}
}
template<class ELFT>
void ELFDumper<ELFT>::printProgramHeaders() {
ListScope L(W, "ProgramHeaders");
for (typename ELFO::Elf_Phdr_Iter PI = Obj->begin_program_headers(),
PE = Obj->end_program_headers();
PI != PE; ++PI) {
DictScope P(W, "ProgramHeader");
W.printEnum ("Type", PI->p_type, makeArrayRef(ElfSegmentTypes));
W.printHex ("Offset", PI->p_offset);
W.printHex ("VirtualAddress", PI->p_vaddr);
W.printHex ("PhysicalAddress", PI->p_paddr);
W.printNumber("FileSize", PI->p_filesz);
W.printNumber("MemSize", PI->p_memsz);
W.printFlags ("Flags", PI->p_flags, makeArrayRef(ElfSegmentFlags));
W.printNumber("Alignment", PI->p_align);
}
}

1
tools/llvm-readobj/ObjDumper.h
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@ -38,6 +38,7 @@ public:
// Only implemented for ELF at this time.
virtual void printDynamicTable() { }
virtual void printNeededLibraries() { }
virtual void printProgramHeaders() { }
protected:
StreamWriter& W;

6
tools/llvm-readobj/llvm-readobj.cpp
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@ -121,6 +121,10 @@ namespace opts {
cl::opt<bool> NeededLibraries("needed-libs",
cl::desc("Display the needed libraries"));
// -program-headers
cl::opt<bool> ProgramHeaders("program-headers",
cl::desc("Display ELF program headers"));
// -expand-relocs
cl::opt<bool> ExpandRelocs("expand-relocs",
cl::desc("Expand each shown relocation to multiple lines"));
@ -215,6 +219,8 @@ static void dumpObject(const ObjectFile *Obj) {
Dumper->printDynamicTable();
if (opts::NeededLibraries)
Dumper->printNeededLibraries();
if (opts::ProgramHeaders)
Dumper->printProgramHeaders();
}